Metacaulk Fire Rated Mortar Metacaulk® Fire Rated Mortar is a specially formulated rapid hardening gypsum/cement compound. The product provides the optimum combination of workability, strength and fire resistance. Technical Data Sheet : English Category: Metacaulk Related products MetacaulkMetacaulk Pipe Collars Read more MetacaulkMetacaulk Cast-In-Place Read more MetacaulkMetacaulk BlazeSeal Read more